Combination machine for sharpening tools



gums? March 8, 1938., J, T. SIMMQNS ET AL COMBINATION MACHINE FOR SHARPENING TOOLS Filed J1ily 11, 1955 5 Sheets-Sheet l March 8, 1938. J. T. SIMMONS ET AL 2,310,637

COMBINATION MACHINE FOR SHARPENING TOOLS Filed July 11, 1935 3 Sheets-Sheet 2 March 8, 1938. J. T. SIMMONS ET AL I I COMBINATION MACHINE FOR SHARP ENING TOOLS Filed July 11, 1935 5 Sheets-Sheet 5 Patented Mar. 8, 1938 PATENT OFFICE COMBINATION MACHINE FOR SHARPENING TOOLS Jesse T. Simmons and Richard 0. Gilliam, Henderson, Tenn.

ApplicationJuly 11, 1935, Serial No. 30,912

4 Claims.

Our invention relates to an improvement in combination machine for sharpening tools.

One of the objects is to provide a machine in which the blades of a lawnmower may be sharpened without removing the blades from or dismantling the lawnmower.

Another object is to provide means for easily adjusting the machine for sharpening other tools, such as drills, augers, and the like and for sawing and lathe work.

With these main objects in view, the invention consists in a number of removable and adjustable attachments for adapting the invention quickly for these various purposes.

In the accompanying drawings:

Fig. 1 is a View in perspective showing a lawn mower in position of having its blades sharpened;

Figs. 2 and 3 are enlarged details partly in sec.- tion;

Fig. 4 is a view in front elevation showing the lawnmower dotted in position;

Fig. 5 is a transverse vertical section on the line 5--5 of Fig. 4 looking in the direction of the arrow;

Fig. 6 is a transverse vertical section on the line 6-6 in Fig. 4 looking in the direction of the arrow;

Fig. 7 is a section on line 'I-'I of Fig. 8 looking in the direction of the arrows;

Fig. 8 is a view in elevation showing the machine used as a lathe with parts broken away and some in section;

Fig. 9 is a sectional detail of the same slightly enlarged with a portion of the work brokenaway;

Fig. 10 is a view in perspective of the removable chuck-head; and

Fig. 11 is a sectional view showing a drill or auger-bit applied in place of the lathe work.

A represents the frame of the machine, the legs 40 I of which are mounted upon and secured to a suitable base 2.

The frame A may be variously constructed but in the form shown consists of two channel-irons 3 suitably spaced apart, as shown in Fig. 13, and bolted at their ends to the legs I.

A yoke 4 is slidably and adjustably connected with the channel-irons of the frame by means of a bolt 5 which passes down through the base of the yoke and between the channel-irons 3 where it is held securely in place by the nut 6 screwed on the lower end of the bolt 5.

A main drive shaft 1 is journaled in ball-bearings 8, in the upper ends of the yoke 4,

A disk 9 is removably secured on the outer end of the drive-shaft I, and. this is employed as a means for sharpening various sharp-edged tools, such as knives, shears, clippers, and the like, by gluing some abrasive material, such as emery paper or the like, to its outer surface, and holding the article to be sharpened against it as it rotates.

The shaft is driven by a motor M, as illustrated in Fig. 1, through a belt I0 preferably of the V- type. In order to attain different speeds, two pulleys III2 of different diameters are keyed to the drive shaft 1, and similar pulleys I3 and Ma. are secured to the armature shaft of the motor M, as shown in Fig. 1.

A standard I4 is fitted for slidable and adjustable connection with and between the channelirons 3 of the frame, where it is held in adjusted position by the screw I5 which has the handle I6 to facilitate turning and tightening the same. The screw I5 extends through a block II, which latter is fitted to slide between the channel-irons 3, and screws into a threaded hole in the standard I 4, as best shown in Figs. 5 and 6, in that way holding the standard rigidly in any adjusted position.

One of the special functions of our present invention is to provide means for sharpening the rotary cutter-blades of a lawnmower without the necessity of dismantling or taking the lawnmower apart, except the main wheels which are removed. The lawnmower is placed in the position illustrated in Figs. 1, 4 and 5, with the cutter-shaft I8 which carries the cutter-blades 20, in alignment with the drive-shaft I as shown in Fig. 3, and the protruding ends of the cutter-blade shaft I8 extend into sockets ZI on the end of drive shaft 1, and 22 on the end of the stub-shaft 23. A pin 24 extending transversely through a hole in the shaft I8 is held in notches 25 in the socket H, which constitutes a coupling between shafts I and I8, so that when the parts are thus assembled, they turn together. I

The stub shaft 23 has a threaded portion 26- which turns in the threaded hole 21 in the standard I I, and as a means for turning this. stubshaft 23 in the threaded hole 21 it is provided with a handwheel 28, by turning which the socket 22 which holds and centers one end of the shaft I8 of the lawnmower, is turned to adjust and regulate the position of the socket 22. When thus adjusted, the L-shaped lock bolt 29 is screwed in place against the stub-shaft 23 to hold it from turning.

The shaft I8 extends through stationary side plates 30 constituting a part of the frame of the lawnmower as viewed in Fig. 3.

A work rest 3| hinged to an arm 32 secured to the frame of the machine constitutes a support for the handle 33 of the lawnmower, as illustrated in Fig. 5. The arm 32 is clamped to the channel-irons 3 of the frame A by the screw 34 passing through a block between the bars similar to the block H, as illustrated in Fig. 4.

The arm 32 may be adjusted along the frame A by unscrewing and tightening the screw 34. The rest 3| by being swung in the arc of a circle from its hinged point 35 provides means for varying the inclination of the handle 33 of the lawnmower, and consequently the position of the entire lawnmower and the cutter blades.

To sharpen the blades, some abrasive material is placed on the edge of the stationary blade 36 and the motor M, is started, and by the wellknown grinding contact of the cutter-blades 20 with the abrasive material on the edge of the stationary blade 36 all the blades are sharpened evenly throughout their length. In this way all blades are sharpened at the same time.

With slight change in re-adjustment, our improved machine is just as applicable to other Work, for example the turning of round forms, that is to say lathe work, such as is illustrated in Figs. 7 to 10, inclusive. As shown in Figs. 8 and 9, the object to be turned is indicated by the letter W, which, for purposes of illustration, happens to be a table leg. This is held in position by simply inserting the chuck 40 (see Figs. 8 and 9) in the socket 2 I, where it is held against relative turning by the pin 24 which is passed through a hole in the shank of the chuck (as shown in Figs. 9 and 11) with the outer ends resting in the notch 25, thus securing the chuck to the shaft 1 so they will turn together. The chuck has teeth 4| which engage the work W and cause the work to turn with the chuck and the shaft 1.

A centering pin 42 is inserted in the socket 22 of the stub shaft 23 and extends into the center of the work W as shown in Figs. 8 and 9, and by turning the hand-wheel 28 the threads 26 of the stub-shaft move the latter endwise the required distance to hold the work securely between the inner end of the pin 42 and the chuck 40. The L-shaped lock pin 29 holds the stubshaft 23 against turning.

The tool employed for fashioning the work is held upon the rest 3| in the usual manner of doing turning.

By referring to Fig. 11, it will be seen how the machine may be turned for drilling or boring through metal or wood as represented by the numeral 45 in Fig. 11, the drill 46 being held in the chuck 40 by a set-screw 41.

Thus we have provided a machine of few, simple and sturdy parts, light enough to be practically portable and adapted with slight adjustment for sharpening knives of a lawnmower and various other sharp-edged tools, also as a saw, a lathe, and a drill, thus having a variety of uses with very slight adjustment by any operator with ordinary skill.

We claim:

1. The combination of a frame including parallel channel-irons and legs upon which the latter are supported, a yoke, and a standard supported on the channel-irons and each having a portion extending between the latter, blocks located beneath the channel-irons with portions of the blocks extending between the latter, bolts extending through the blocks and into the yoke and standard for adjustably clamping the latter and said yoke and standard to the channelirons, a drive-shaft journaled in the upper end of the yoke, and a stub-shaft screwed into a hole of the upper end of the standard, the drive-shaft and stubshaft constructed at their inner ends to receive the ends of the cutter-shaft of a lawnmower, whereby to impart rotary motion to the latter while the cutter-blades are being sharpened.

2. The combination of a frame including parallel channel-irons and. legs upon which the latter are supported, a yoke, and a standard supported on the channel-irons and each having a portion extending between the latter, blocks located beneath the channel-irons with portions of the blocks extending between the latter, bolts extending through the blocks and into the yoke and standard for adjustably clamping the latter and said yoke and standard to the channelirons, a drive-shaft journaled in the upper end of the yoke, and a stub-shaft screwed into a hole of the upper end of the standard, the driveshaft and stub-shaft constructed at their inner ends to receive the ends of the cutter-shaft of a lawnmower, whereby to impart rotary motion to the latter while the cutter-blades are being sharpened, and means for turning the driveshaft at different speeds according to the requirements.

3. The combination of a frame including parallel channel-irons and legs upon which the latter are supported, standards supported on the channel-irons and each having a portion extending between the latter, blocks located beneath the channel-irons with portions of the blocks extending between the latter, bolts extending through the blocks and into the standards for adjustably clamping said blocks and standards to the channel-irons, a drive shaft journaled in the upper end of one standard, a stub shaft carried by the upper end of the other standard, said drive shaft and stub shaft being constructed at their inner ends to receive and support work therebetween.

4. The combination of a frame having parallel spaced angle bars and having means for supporting a lawnmower thereon for sharpening the blades thereof, a bracket extending transversely of said angle bars, a block located beneath the angle bars, a bolt extending through said block and connected with the bracket for securing the same to the angle bars, and a work rest pivotally supported by said bracket at the outer end thereof and extending upwardly in position to engage and support the lawnmower handle. 7

JESSE T. SIMMONS. RICHARD O. GILLIAM. 

